Some people set their goals very low because if they don’t achieve them to the standards they’ve set for the goals they get crushed. They may become depressed. They haven’t built resilience, the ability to bounce back from adversity.
Life is 10% what happens to you and 90% how you react to it. If you set out to do a load of laundry, but for whatever reason you can only do half a load, you haven’t failed at doing laundry. You did half a load, and as soon as you can you’ll do the other half. Everything is fine.